From left, Michael Correy and Andrew Garvey rehearse for Rock of Ages, to be performed at the Lucille Ball Little Theater of Jamestown, 18 E. Second St. P-J photo by Michael Zabrodsky

With the musical Rock Of Ages, the unwritten rule of an audience sing-along is, ironically, silenced – nary a shush is heard.

And for good reason – the power of music and words is so compelling.